error message Illegal filter on Attachment

Hello Bill, https://skuid.cs52.visual.force.com/apex/skuid__ui?page=CyrilOppty__*NewOppCreation*3 Process is in test right now. Idea is to reproduce the salesforce.com standard ‘New’ button on the opportunities TAB into the new oppty skuid page i am building right now. Works for me but not for sales reps when i login as a sales rep in test. Thank you. Cyril